from The Century Dictionary and Cyclopedia
- n. In libraries, a room devoted to stacks of book-shelves; a book-room.
Sorry, no etymologies found.
Open stacks doesn't appear in the index although stack architecture and stack-room do.
The old man had received strict orders to preserve silence in the reading-room when the librarian could not be there, and yet one day she returned from the stack-room to find the place in a most shocking state of confusion.
When the young-lady librarian arrived from Albany and approved enthusiastically of the stack-room and cataloguing, the architect's cup of satisfaction fairly ran over; and when he went away, leaving her installed in her handsome oak-finished office, he could hardly refrain from embracing her, so exactly the right touch did she add to the whole thing with her fresh white shirt-waist and pretty, business-like airs.
In the stack-room below, on sixty-three miles of shelves, stood a million others ready to come at her slightest nod.